What key feature differentiates a 4 wheel drive system from a 2 wheel drive system?

The distinguishing feature of a 4 wheel drive system is that it provides power to both the front and rear wheels. This characteristic is what enables 4 wheel drive vehicles to have better traction and control in a variety of driving conditions, particularly on rough terrains, mud, snow, or ice. By distributing power to all four wheels, a 4 wheel drive system can enhance stability and make it easier for the vehicle to navigate challenging environments, which is especially crucial for off-roading or in adverse weather conditions.

On the other hand, 2 wheel drive systems only deliver power to one set of wheels—either the front or the rear. This limitation can restrict the vehicle's performance in situations where maximum traction is needed. Therefore, the ability of a 4 wheel drive system to engage all four wheels is essential for certain driving scenarios, setting it apart from a 2 wheel drive system.